This is the one I ordered which fits:
http://store.blendmount.com/blendmou...017-p1662.aspx
Oddly enough from the BMW link they don't list this one anymore, so perhaps open a support chat with them and ask what gives.
EDIT: Ah, nevermind I see now, I didn't notice the "options" button. So it's under 3/4" metal stem, without camera.